<!DOCTYPE html>
<img alt="bar"
     src="<warning descr="Cannot resolve file 'foo'">foo</warning>"
     loading="eager"
>
<img alt="bar"
     src="<warning descr="Cannot resolve file 'foo'">foo</warning>"
     loading=lazy
>
<img alt="bar"
     src="<warning descr="Cannot resolve file 'foo'">foo</warning>"
     loading="<warning descr="Wrong attribute value">fast</warning>"
>
<img alt="bar"
     src="<warning descr="Cannot resolve file 'foo'">foo</warning>"
     <warning descr="Attribute loadng is not allowed here">loadng</warning>="fast"
>